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(: Test: K-SeqExprTreat-15                               :)
(: Written by: Frans Englich                             :)
(: Date: 2007-11-22T11:31:22+01:00                       :)
(: Purpose: A complex 'treat as' expression, stressing parser and evaluation logic. Implementations supporting the static typing feature may issue XPTY0004. :)
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(4 treat as item() + - 5) = ((4 treat as item()+) - 5)